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وارد شوید

JAMB - Mathematics (1994 - No. 44)

In the diagram, PTS is a tangent to the circle TQR at T. Calculate < RTS
120o
70o
60o
40o

توضیح

RTS = RQT (angle between a tangent and a chord at the point of contact is equal to the angle in the alternate segment) But R = Q + T = 180

RQT = 180o - (50 + 60)

= 180o - 110o

= 70o

Since RQT = RTS = 70o

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